Campbell Scientific RF450 Spread Spectrum Radio - Manual (Page 31)

Appendix A. Installation Scenarios
A.2 Example 2: PC-to-RF Network with Repeater
In this example, the Master radio is connected to a PC running LoggerNet (see
Figure A.2-1). Slave radios are connected to CR1000s in the field. One Slave
radio, also connected to a CR1000, is used as a repeater to go around an
obstacle such as a hill. To take advantage of the low power mode, those
devices that are NOT repeaters should be configured as multi-point Slaves and
not as mult-point Slave/repeaters. In this configuration, it may be desirable to
use an external omni directional antenna at the repeater.
When a repeater is used, the RF throughput is cut in half. When more than one
repeater is used there is no further degradation in the RF throughput of the link.
Throughput is the rate at which data is sent or received. Reducing throughput
means less data can be transmitted in a specified amount of time.
Remember, each datalogger must have a unique PakBus Address.
Master
RF450
Slave
Slave
Slave/
Repeater
PC Running
LoggerNet
/PC400
FIGURE A.2-1. Schematic of PC-to-RF450 Network with Repeater
TABLE A.2-1. RF450 Settings for Example 2
Master Slave/Repeater Slave(s)
Hardware RF450 connected to PC
running LoggerNet RF450 connected to CR1000's
CS I/O port RF450 connected to
CR1000's CS I/O port
PakBus Address 4094 2 3
Keep all factory default settings except:
Radio Operation
Mode
Multi-Point Master Multi-Point Slave/Repeater Multi-Point Slave
Repeaters Used Yes, check box Yes, check box Yes, check box
Network ID 1726 (yours may be different) 1726 (yours may be different) 1726 (yours may be
different)
Frequency Key 1 (yours may be different) 1 (yours may be different) 1 (yours may be different)
Radio ID 4094 (to match LoggerNet's
PakBus Address) 2 (to match CR1000's PakBus
Address) (a) 3 (to match CR1000's
PakBus Address) (a)
A-3